The renewed CDF II experiment recently re-started data taking.
The data collected lately already provides insight in the heavy flavor
capabilities of this p anti-p experiment.  As a benchmark of these
possibilities we present two preliminary results: the measurement of the
branching fractions BR (D0 --> pi+ pi-) and BR (D0 --> K+ K-) relative
to BR (D0 --> K+/- pi-/+) and the measurement of the invariant mass
difference between D+/-_s --> phi pi+/-, phi --> K+ K- and D+/- --> phi
pi+/-, phi --> K+ K-.  The preliminary results are BR(D0 --> pi+ pi-)/BR
(D0 --> K+/- pi-/+) = 3.37 +/- 0.20(stat) +/- 0.16(sys) %, BR(D0 --> K+
K-)/BR(D0 --> K+/- pi-/+) = 11.17 +/- 0.48(stat) +/- 0.98(sys) % and
Delta m (D_s - D+) = 99.28 +/- 0.43(stat) +/- 0.27(sys) MeV/c2.  All
results are consistent with PDG expectation.